**Full name:** millimeter of mercury [0 °C]

**Plural form:** millimeters of mercury

**Symbol:** mmHg

**Alternate spelling:** mm of mercury

**Category type:** pressure

**Scale factor:** 133.32239

The SI derived unit for pressure is the pascal.

1 pascal is equal to 0.0075006156130264 .

Valid units must be of the **pressure** type.

You can use this form to select from known units:

The torr (symbol: Torr) or millimetre of mercury (mmHg) is a non-SI unit of pressure. It is the atmospheric pressure that supports a column of mercury 1 millimetre high. The unit is named after Evangelista Torricelli, Italian physicist and mathematician, for his discovery of the principle of the barometer in 1643.

millimeter of mercury [0 °C] to dekabar

millimeter of mercury [0 °C] to inch of air [0 °C]

millimeter of mercury [0 °C] to femtopascal

millimeter of mercury [0 °C] to ton/square foot [short]

millimeter of mercury [0 °C] to dyne/square centimetre

millimeter of mercury [0 °C] to centimeter of mercury [0 °C]

millimeter of mercury [0 °C] to sthene/square metre

millimeter of mercury [0 °C] to hectopascal

millimeter of mercury [0 °C] to foot of mercury [0 °C]

millimeter of mercury [0 °C] to ounce/square inch